Research Highlights

Research Highlights

A selection of highlights culled from publications by HAO staff.

Two rows of colorful squares, 8 total, showing coronal geyser jet action

Thermal and Non-thermal Properties of Active Region Recurrent Coronal Jets Publication Name

Alin R. Paraschiv, Alina C. Donea, and Philip G. Judge present comprehensive observations of recurrent active region coronal jets, and derive their thermal and non-thermal properties. We discuss a peculiar penumbral magnetic reconnection site, which we previously identified as a "Coronal Geyser".

6 blue earth images showing the progression of nightside vertical ion drift

Penetrating Electric Field Simulated by the MAGE and Comparison with ICON Observation

Qian Wu, Wenbin Wang, Dong Lin, Chaosong Huang, and Yongliang Zhang use the newly developed, Multiscale Atmosphere-Geospace Environment (MAGE) model to simulate the penetrating electric field in the equatorial region under different interplanetary magnetic field (IMF) BZ conditions during September 2020.

Lower-atmosphere processes in the ionosphere-thermosphere

Scientific Motivations and Future Directions of Whole Atmosphere Modeling

Dr. Nick Pedatella asserts that the advancement of whole atmosphere models has contributed to understanding the significant role terrestrial weather has on generating variability in the ionosphere-thermosphere.

Daily averaged TEC

On the variability of total electron content over Europe during the 2009 and 2019 Northern Hemisphere SSWs

T. A. Siddiqui, Y. Yamazaki, C. Stolle, A. Maute, J. Lastovicka , I. K. Edemskiy, Z. Mosna investigated the variations of the TEC over Europe during two northern hemisphere SSWs events in 2009 and 2019 examining the dominant drivers and their respective contributions to TEC changes during both SSW events.

CPU-GPU strong scaling of a multi-band 288x288x288 dataset

Refactoring the MPS/University of Chicago Radiative MHD (MURaM) Model for GPU/CPU Performance Portability Using OpenACC Directives

E. Wright, D. Przybylski, M. Rempel, C. Miller, S. Suresh, S. Su, R. Loft and S. Chandrasekaran present challenges and strategies to accelerate a multi-physics, multi-band MURaM using a directive-based programming model, OpenACC in order to maintain a single source code across CPUs and GPUs. 

Coronal hole centroid latitude vs. Carrington Rotation

Study of Coronal Hole Lifetimes

Ian Hewins, Sarah Gibson, David Webb, Bob McFadden, Thomas Kuchar, and Barbara Emery-Geiger use the McIntosh Archive of solar features to analyze the evolution of coronal holes over more than three solar cycles. They demonstrate that coronal hole positions and lifetimes change dramatically on time scales from months to yrs, and that the pattern of these changes is clearly linked to the solar activity cycle.

Locations of Solar Parker Probe described as data points

Critical Science Plan for the Daniel K. Inouye Solar Telescope (DKIST)

Sarah Gibson, Philip Judge, Mark Rast, Nazaret Bello Gonzalez, Luis Bellot Rubio, and others assert that the Daniel K. Inouye Solar Telescope (DKIST) will revolutionize our ability to measure, understand and model the basic physical processes that control the structure and dynamics of the Sun and its atmosphere.

Non-potentiality diagnostics of the energized flux-rope simulation at time step 89

Designing a New Coronal Magnetic Field Energy Diagnostic

In the solar corona, the free energy, i.e., the excess in magnetic energy over a ground-state potential field, forms the reservoir of energy that can be released during solar flares and coronal mass ejections. Marcel F. Corchado-Albelo, Kévin Dalmasse, Sarah GibsonYuhong Fan, and Anna Malanushenko investigate the possibility of exploiting such observations for mapping and studying the accumulation and release of coronal free magnetic energy, with the goal of developing a new tool for identifying "hot spots" of coronal free energy such as those associated with twisted and/or sheared coronal magnetic fields.

Two stacked graphs comparing proton flux against solar flux

Gleissberg Cycle Dependence of Inner Zone Proton Flux

Authors E. J. Bregou, M. K. Hudson, B. T. Kress, M. Qin, and R. S. Selesnick find a long-term increase in measured proton flux over four ~11 year cycles of solar activity. The inner zone proton radiation belt consisting of 10’s to >100 MeV protons trapped in the Earth’s magnetic field is examined from 1980 to mid-2021 using measurements from four NOAA POES satellites.